What was found
APPROACH TO LANDING, WOULD NOT EXTEND, ELECTRICALLY. MANUAL EXTENSIONS PROCEDURES WERE FOLLOWED AND OPERATED NORMALLY. PILOT EXTENDED LANDING GEAR USING MANUAL EXTENSION PROCEDURES, 3 GREEN DOWN AND LOCKED INDICATIONS, AN UNEVENTFUL LANDING WAS COMPLETED. AC RETURNED ON A FERRY FLIGHT. TROUBLESHOOTING IS ON GOING, PROBLEM COULD NOT BE DUPLICATED. (K)